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CN-121993302-A - Method and device for controlling a throttle valve in an intake pipe of an internal combustion engine

CN121993302ACN 121993302 ACN121993302 ACN 121993302ACN-121993302-A

Abstract

A method and a device for controlling a throttle valve (1) in an intake pipe (2) of an internal combustion engine (10) are proposed, wherein the power required by a user of the internal combustion engine is achieved by means of a control signal for opening the throttle valve (1). The power requested by the user at a first point in time is achieved at a later second point in time by means of a control signal of the throttle valve (1).

Inventors

  • R. Wacrow
  • S. OTTO

Assignees

  • 罗伯特·博世有限公司

Dates

Publication Date
20260508
Application Date
20251031
Priority Date
20241104

Claims (10)

  1. 1. Method for controlling a throttle valve (1) in an intake pipe (2) of an internal combustion engine (10), wherein a power requested by a user of the internal combustion engine is realized by means of a control signal for opening the throttle valve (1), characterized in that a power requested by the user at a first point in time is realized by means of the control signal of the throttle valve (1) at a later second point in time.
  2. 2. Method according to claim 1, characterized in that for selecting the later second point in time, a determined crank angle of the internal combustion engine (10) is selected in a working cycle of the internal combustion engine.
  3. 3. Method according to claim 2, characterized in that the later second point in time is selected such that the injection quantity of fuel is also adapted to the quantity of air produced by the actuation of the throttle valve (1) at the selected second point in time in the operating cycle of the internal combustion engine (10).
  4. 4. A method according to claim 2 or 3, characterized in that, in order to select the later second point in time, a time delay between the manipulation of the throttle valve (1) and the change caused by the manipulation of the amount of air flowing into the internal combustion engine (10) is taken into account.
  5. 5. Method according to claim 1, characterized in that, for selecting the later point in time, the compression work of the internal combustion engine (10) is taken into account.
  6. 6. Method according to any of the preceding claims, characterized in that the variation of the manipulation signal is limited to a maximum value.
  7. 7. Method according to any one of the preceding claims, characterized in that, for selecting the later second point in time, the speed of the internal combustion engine (10) is taken into account, in particular, the realization of the power requested by the user at the first point in time at the later second point in time is only carried out within a predetermined speed.
  8. 8. Method according to any of the preceding claims, characterized in that the power requested by the user when the inlet valve of the internal combustion engine (10) is open is achieved at a later second point in time when the inlet valve is closed by means of a control signal of the throttle valve (1).
  9. 9. Method according to any of the preceding claims, characterized in that for a working cycle of the internal combustion engine extending over 720 ° of crank angle, the calculation of the control signal is performed at a fixed crank angle, in particular every 180 ° of crank angle, and the control of the throttle valve (1) is performed in the calculation immediately before closing the inlet valve.
  10. 10. Device for controlling a throttle valve (1) in an intake pipe (2) of an internal combustion engine, which device realizes the power requested by a user of the internal combustion engine (10) by means of a control signal for opening the throttle valve (1), characterized in that the device realizes the power requested by the user at a first point in time by means of the control signal of the throttle valve (1) at a later second point in time.

Description

Method and device for controlling a throttle valve in an intake pipe of an internal combustion engine Technical Field The present invention relates to a method for controlling a throttle valve in an intake pipe of an internal combustion engine and to a device for controlling a throttle valve in an intake pipe of an internal combustion engine. Background The invention is based on a method and a device for controlling a throttle valve in an intake pipe of an internal combustion engine according to the preamble of the independent patent claim. It is known to control the power of an internal combustion engine by influencing the amount of air taken in by the internal combustion engine. For this purpose, a throttle valve in an intake pipe of the internal combustion engine is actuated in order to influence the amount of air taken in by the internal combustion engine. In the event of an undesired actuation of the throttle valve, an undesired motor stop may occur here, typically in the near idle range due to an incorrect actuation of the clutch. Disclosure of Invention The method according to the invention or the device according to the invention, in contrast thereto, has the advantage that an improved control of the throttle valve is ensured. In particular, a change in the position of the throttle valve, which can lead to an undesired operating state of the internal combustion engine, is avoided. In this way, the desired operation of the internal combustion engine is ensured. In particular, by means of the method according to the invention or the device according to the invention, the risk of undesired motor stopping of the internal combustion engine can be significantly reduced in the event of rapid changes in the driving intent. Further advantages and improvements are obtained by the measures of the dependent patent claims. In a particularly simple manner, a suitable crank angle for actuating the throttle can be selected. It may be suitably selected so that the injection amount of fuel can be adapted in accordance with the manipulation of the throttle valve. The time offset between the actuation of the throttle valve and the resulting air quantity can be taken into account here as appropriate. In this way, the quality of the manipulation of the throttle valve is improved. Further, compression work of the internal combustion engine, which is generated by a change in the position of the throttle valve, is appropriately considered. For this purpose, the throttle control is limited to a maximum value. The disadvantageous adjustment of the throttle valve is problematic in particular in the low rotational speed range of the internal combustion engine. It may thus be provided that the method according to the invention is carried out only within a predetermined rotational speed of the internal combustion engine. In a particularly simple manner, it can be provided that the power of the internal combustion engine requested is changed when the inlet valve is open only when the inlet valve is closed again by means of a control signal to the throttle valve. If the calculation of the control signal takes place in a predetermined angle window, a defined angle window can be provided for the calculation and output. In this case, it is particularly advantageous if the angle window immediately before the closing of the inlet valve is provided. Drawings Embodiments of the invention are illustrated in the accompanying drawings and described in more detail in the following specification. FIG. 1 shows a schematic diagram of an internal combustion engine, and Fig. 2 shows different signals of the internal combustion engine with respect to an angle scale. Detailed Description Fig. 1 schematically shows an internal combustion engine 10 having a cylinder 3 in which a piston 4 is arranged. Above the piston 4, the cylinder 3 forms a combustion chamber 5 into which a mixture of fuel and air is introduced and combusted. By combustion of the fuel-air mixture in the combustion chamber 5, the pressure in the combustion chamber 5 increases and by movement of the piston 4 in the cylinder 3 mechanical work is converted by means of a connecting rod and a crankshaft, which are not shown here. Thus, reference is made herein to a known gasoline or diesel internal combustion engine. In order to supply air into the combustion chamber 5, an intake pipe 2 is provided in which the amount of air supplied is controlled by a throttle valve 1. By opening and closing the throttle valve 1, the amount of air introduced into the combustion chamber 5 is controlled. Furthermore, a fuel injection valve is provided either in the intake pipe 2 or directly in the combustion chamber 5, by means of which fuel is injected either into the flowing air in the intake pipe 2 or directly into the combustion chamber 5. For reasons of simplicity, the fuel injection valve is not depicted in fig. 1. In order to draw off the exhaust gases after combustion, an exhaust pipe 8 is provided